Credit card companies that prevented card-holders from donating money to the secrets outlet WikiLeaks could have their operating licenses taken away in Iceland, according to members of the Icelandic Parliamentary General Committee.

Representatives from Mastercard and Visa were called before the committee Sunday to discuss their refusal to process donations to the website, reports Reykjavik Grapevine.

"People wanted to know on what legal grounds the ban was taken, but no one could answer it," Robert Marshall, the chairman of the committee, said. "They said this decision was taken by foreign sources."

The committee is seeking additional information from the credit card companies for proof that there was legal grounds for blocking the donations.